New phosgene-free procedure for preparation of methyl N-phenylcarbamate and dimethyl diphenylmethane dicarbamate as important precursors for producing iso- …

V Jakuš, E BoJSOVA

文献索引：Jakus, Vladimir; Bojsova, Eva Collection of Czechoslovak Chemical Communications, 1992 , vol. 57, # 7 p. 1505 - 1515

全文：HTML全文

被引用次数: 6

摘要

Abstract Methyl N-phenylcarbamate was prepared by reductive carbonylation of nitrobenzene in the presence of methanol and a new catalytic system composed of sulfur, vanadium pentoxide and a base-alkoxides of alkali metals or hydroxides of alkali metals or alkali earths-in good yields. Reaction mechanism of this process is discussed. Diphenylmethane dicarbamates were obtained by acid-catalyzed condensation of methyl ...